Governor



A. C. HOOF July 17,. 1934.

GOVERNOR Original Filed Sept. 17. 1952 .'40 ruil.

Patented July 17, 1934 1,966,72; GovEnNon Addison C. Hoof, Hinsdale, lll.

original applicati@ september 17, 1932, serial No.'

633,695. 'Divided and this application June v30,

7 Claims. (Cl. 137-1525 This invention' relates to improvements in governors more particularly for gas engines, where a throttle valve is inserted in the neck of the intake manifold; and the closing movements thereof, under the forcescreated by the cylinder displacement at diilerent loads for a desired speed are balanced by a spring resistance.

This application is a division oi my co-pend- Eli) ing application Serial Number 633,695, iled September 17, 1932, and an improvement upon the disclosure of application, Serial Number 443,265, led April 11, 1930, now Patent Number 1,910,899.

i5 Objects of this invention are toprovide key controlled means for adjusting the governor, and also securing the cover of the governor housing in position. More speciilc objects are to provide a simple construction of the hous- ,2 ing, cover and lock; and to provide a construction in which a common form oi cylinder lock may be used, the cylinder type of lock Abeing considered a more secure form vof lockingpmeans than padlocks, bolt locks, and the like.- 35 Further objects of the invention are -to provide a governor having a key controlled adjustment, and also a closure which is locked by the same key to prevent tampering.

Other objects and advantages will become ap- 30 parent in the following description of an illustrative embodimemnt oi the invention, with reference to the accompanying drawing, in which: Fig. 1 is a side elevation, partly in section, of the governor incorporated in a block which 35is inserted between the bolting flanges of the engine intake manifold and the carburetor, as will be understood.

Fig. 2 is a plan section, taken substantially on the line 2-2 o! Fig. 3, with parts shown in Fig. 3 is a section on line`33 of Fig. 1. Fig. 4 vis a partial section on the line 4 4 o! Fig. 5 is adetail section taken on line 5--5 45 oi Fig. 1.

Fig. 6 is a cross section ofthe lock cylinder.

On one side of the block 16 is formed a house ing 11,-having a chamber 12 which is covered by means of a removable plate 13. An intake 5 duct portion 14 extends vertically through the block, and in the block is journaled a horizontally disposed shaft 15 which extends through the wall onone side of the duct and into the chamber 12. 1n the `duct a plate valve 16 is 55 rigidly secured to the shaft; and on the outer end of the shaft, within the housing. is. pinned an arm 17-having a roller 18 rotatably mounted on its outer end. In the wide open position of the valve, the arm 17 abuts against a stop lug 18a formed on the adjacent wall of the 00 housing. A

In the base of the housing 11, below and atthe side of the shaft opposite the arm 17, is formed a boss 19 in which is rotatably mounted a block 2o which has a. lug 21 Yextending into the 1.6. boss. The block 20 has a transverse slot 22 in which is clamped, by means of screw 24, a multiple graduated lea! spring 25 which extends below the shaft substantially parallel with the arm in the open position of the valve, the 7 longest leaf being in cooperable relation with roller 18.

A screw 26 is rotatably mounted in a lug 27, formed on the lower wall of the housing, and threaded on the screw is nut 28 which is en- 75, gaged in a. notch 29 formed in the lower end of the block20. Thus the spring may be swung towards or away from the arm 17 by rotating the screw 26 to eiIect tension adjustments.

In the lower corner of the housing is provided 3 a boss 30 which has a bore 31, in alignment with the screw 26, for receiving a lock cylinder 32,

. having transversely disposed locking tumblers 33. On the inner end of the cylinder is an eccentricallydisposed lug 34 which enters a cross slot 35 milled in the head 36 of the screw 26, so that the rotative positionof the screw is controlled by the lock cylinder.

The enlarged end 37 of the lock cylinder 32 abuts against a shoulder 38, formed in the bore 31, and oppositely disposed longitudinal slots 39 are formed in the walls of the bore for locking engagement of the tumblers 33.

The cover plate 13 is locked in position by the insertion of the cylinder 32. On the inner side 9.5 of the upper edge of the' plate 13 are provided two curved lugs 40.which hook into suitable slots 41 lprovided in the upper wall of the housing 11; and on the lower corner of the cover isa lug 42 which enters an enlarged recess .43 in the housing which is intercepted by the bore 31. The lug 42 is provided with an aperture 44 which registers with the cylinder bore 31 when the cover is in closed position, and receives the lock cylinder. l

The cylinder is-prevented from withdrawal by means of a radial lug 45 formed on the inner end thereof. The cylinder is inserted with the tumblers retracted and the lug 45 'is passed through a notch 46 formed in one side of the a position at which the torque on the shaft and opposing resistance of the spring are equal.

The resistance of the spring is built up and the stiffness of the spring increases at an ever increasing rate as the exure is increased, and this building up of resistance is further accentuated as the roller 18 rides up on the spring Aand moves closer to the support block 20. Thus by proportioning the various parts, and regulating the eifective lengths of the leaves, the re sistance can be regulated to closely approximate the torque on the shaft at each position of the valve for the desired engine speed.

' By changing the position of the block 20, rotatively, by inserting a key in the lock cylinder 32 and thus turning the screw 26, the governed speed can be changed as desired, and the resistance is increased more rapidly at higher tensions in accordance with the greater increases in the torque at closed valve positions for higher speeds on account of the greater degree of flexure of the spring, so that good regulation can be obtained at diiferent speeds.

Having thus described my invention, I claim:

1. In a gas engine governor having a housing, governing means therefor, a governor adjusting screw rotatably mounted in said housing, the screw having a transversely slotted end,' and a key operated lock cylinder mounted in said housing, said cylinder having an eccentric lug on its inner end which enters the slot so that the screw may be rotated to adjust the governor by inserting a key in the cylinder and thus turning the lock from the exterior of the housing.

2. In a gas engine governor, a housing having a recess and a grooved bore intercepting the recess, governing means in said housing, a governor adjusting screw rotatably mounted in the housing in alignment with said bore, a cover for the housing having a lug which enters the recess, the lug having an aperture which coincides with the bore, and a key operated lock cylinder' having pins for locking engagement in the grooves capable of being inserted into the bore from the exterior of the housing, the cylinder being in engagement with the screw and extending through the lug so that the cover is locked by inserting the cylinder and whereby the governor may be adjusted by turning the cylinder.

3. A housing for a valve governor comprising a body member having a rectangular chamber therein, a control mechanism in said chamber,

adjusting means therefor including a screw member mounted along one wall of said chamber, a cover plate closing one side of said chamber, a pair of curved lugs thereon adapted to enter complementary openings in a wall of said body member, a lug extending at right angles from said cover plate, a bore therethrough, and a lock cylinder operatively connected to said screw member and arranged in said body member by being passed through the bore in the lug extending from said cover plate whereby said cover plate is secured to said body member.

4. In apparatus of the type described, a housing having a rectangular chamber, valve governing means therein. agovernor adjusting screw mounted in said housing, a cover plate closing one side of said chamber, a pair of curved lugs thereon adapted to enter complementary openings in a wall of said body member, a lug extending at right angles from said cover plate, a bore therethrough, and a lock cylinder operatively connected to said screw member and arranged in said body member by being passed through the bore in the lugs extending from said cover plate whereby said cover plate is secured to said body member.

5. In gas engine governor construction, a housing for a governor, said housing having a recess thereinand a bore intercepting the recess, a flat cover plate for one side of said housing, a lug thereon capable of entering said recess, a lock cylinder mounted in said bore and extending through the lug on said cover plate, said lug having a bore therethrough coinciding through which said cylinder extends.

6. In gas engine governor construction, a housing, a valve governing means mounted therein, a at cover plate for said housing, a spring associated with said governor, a screw for adjusting the tension of said spring mounted in said housing. a non-rotatable block associated with said screw, a cylinder lock, key-operated pins extending therefrom, said pins operatively associated with said screw, said cover plate being locked in position on the housing by the insertion of said lock cylinder into the housing, and key means for unlocking said cylinder to permit either the manipulation of said screw or the removal of said cover plate.

7. A housing for a valve governor comprising a body member having a rectangular chamber therein, a control member in said chamber, adjusting means therefor including a screw member mounted along one wall of said chamber, a cover plate closing one side of said chamber, a lug extending at right angles from said cover plate, a bore therethrough, and a lock cylinder operatively connected to said screw member and arranged in said body member by being passed through the bore in the lug extending A from said cover plate whereby said cover plate is secured to said body member.

ADDISON C. HOOF. 

